This events firm, "established in 2003 by a team of professional, environmentally aware event experts," have held conferences with over 4,000 attendees from 76 countries.  You should check out their upcoming events and visit their "live" blog from the conference they're holding now in London.  They've got interesting content, including some "vlogs."  One post, "7 Tips on Eating Differently to Impact Climate Change," is right up my alley.  (More on food and climate change from me a little further on.)